How did you determine code coverage with unit tests in your project?

To determine unit test coverage in Java projects, tools like code coverage analysis tools such as JaCoCo, Cobertura, or IntelliJ IDEA built-in features are usually used.

The process typically includes:

1. Integrating the coverage tool into the build process (e.g., via Maven or Gradle).
2. Running unit tests with coverage metrics collection enabled.
3. Generating reports that show the percentage of covered lines, branches, methods.
4. Analyzing reports to identify uncovered code sections.

Example with Gradle and JaCoCo:

plugins {
    id 'java'
    id 'jacoco'
}

jacoco {
    toolVersion = "0.8.7"
}

test {
    finalizedBy jacocoTestReport
}

jacocoTestReport {
    reports {
        xml.required = true
        html.required = true
    }
}

After running ./gradlew test jacocoTestReport, you will get a report at build/reports/jacoco/test/html/index.html.

This way, you can control the quality of testing and improve coverage by adding tests to uncovered areas.